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<== Date ==> <== Thread ==>

Subject: Alarm annunciation with ALH and other PC based systems
From: Rod Nussbaumer <bomr@triumf.ca>
To: epics Techtalk <tech-talk@aps.anl.gov>
Date: Wed, 14 Jan 2015 13:27:14 -0800
Hi All:

Sorry that this isn't really an EPICS question, other than the tenuous connection via Alarm Handler.

The question has been raised here about how to ensure that the audible alarms from Alarm Handler are always audible. A number of places exist where this can be disabled. The speakers can become faulty, the wall-wart commonly used to power the speakers can become disconnected or faulty, the volume control on the speakers can be turned down, the host OS software controls can be turned down or muted either through accident or software fault, audio cables can become faulty, and sound card hardware can become faulty. Most of these will manifest only in silence.

Has anyone undertaken measures to monitor any of these components in some way, or implemented hardware which is not subject to the common frailties of commodity audio equipment used for control room alarms?

Any suggestions cheerfully accepted. Thanks.

Rod Nussbaumer
E-Linac Controls, TRIUMF
Vancouver, Canada.

Replies:
RE: Alarm annunciation with ALH and other PC based systems Munro Jr, John K.
RE: Alarm annunciation with ALH and other PC based systems ronaldo.mercado
RE: Alarm annunciation with ALH and other PC based systems Emmanuel Mayssat

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